Apparatus for treating materials



March 17, 3193@ R. L.. READING APPARATUS FOR TREATING MATERIALS OriginalFiled Oct. l5, 1951 \\\K^M\\\\\\\\\\\\\\\\\\\v\\\\\ the automaticcontrol of the gas supply to thebaking 4chantier with honesto controlthe. flow of Patented Mar. 17, 193e AL'JNITED' STATI-is PATENT oFFlCERaymond L. Reading, Maywood., Ill., assignor to Western/ElectricCompany,` Incorporated, New York, N. Y., a corporation of New Yorkoriginal application october 15, 1931, `seri'a1 No.

568,985. Divided and this application December 14, u1933, Serial No.702,287

i This invention relates-@to apparatus for treatbottom by a floor I8 ofmaterial similar to that 'ing materials andmore particularly to an appa-Yratus for treating material applied to a liform core, and is a divisionof my copending application, Serial'No. 568,385, led October 15, 1931.An object of the invention is tov provide a simple and eiectiveapparatus for heating a coating applied t a liform core, such as astrand or a ribbon, and in particularfor baking -a coat of enamel onwire.

One embodiment of the invention is characterized primarily by the use ofa combustion chamber and a baking chamber having a common heatCombustible vapors evolved transmitting wall.

by heat'froma raw enamel coated vwire passing through the baking chamberare drawn by the inspiratoraction of a properly positioned gas jetvthrough a conncctingpassage and nozzle from the bakinglhamber into 'thecombustion chamber and there burned to .supply heat-for the bakingchamber: Another feature of the invention is inspirator by means of apyrometer orotherheat actuated device located preferably in the baking.lchamber or in some cases in the combustion Another feature of theinvention is chamber.

'the provision of the wire exit -passage from the air vdrawn into the'system by the inspirator.

Other objects and features of the invention will be apparent from thefollowing detailed description and from'the appended drawing in whichthe single gure isa schematic, longitudinal, central -section of anapparatus embodying 'the invention.

In carrying out th invention as illustrated in the drawing, there isprovided a combustion chamber I0, having side walLsII--II -of anyappropriate heat resisting and heat conductive material, such ascastiron, cast aluminum,

bestos, cement, orthej like, and are lined with a smooth heat reflectinglining I4-I4 of material similar to thatof thewaIlsII-fl I.

The baking.

chambers are open at the bottom and at the top open directly into wireexit passages I5-,I5 and also into a'. commonsarched vaporV passage' I6formed in the roof of the combustion chamber III.

The wire `exit passages I5-I5 are provided with air' baiiies II.-'I'I tocontrdi the inow of air through the passages;

. over a second idler sheaveJII-beside the first to of the walls I3-I3,and is provided near the bottom with an exhaust flue I9 to carrycombustion products away from the chamber and which may be connected toan exhaust fan, Aa stack or other 5 draft inducing means. Within thecombustion chamber are a plurality of baiiles 9 which/aidv indistributing the hot gases and produce even heating of4 all portions ofthe baking chambers.

` The lower side of theAarched passage I6 is pro- -1U vided, at itscrown, withV an inspirator nozzle opening from the p assage I6l into thechamber Ill. In the upper side of the passage I6 is located.

a pressure gas nozzle 2 I opposite to the inspirator nozzle 20 and forcoaction therewith. The presl5 sure nozzle 2| communicates with and isfed fromV a pressure gas main 22 'connected to a source The flow of gasthrough the nozzle 2l and consequently the effectiveness of theinspirator 2Ili's controlled by' any suitable means, here shown as amushroom valve 23, which in turn is 'automativkcally controlled by aheat responsive device -24 '25 preferably positioned in av wall .of thebaking chamber I2. The precise nature of the means by which temperaturevariations of the device 24 are .converted into motions of the valve 23is not pertinent to the present invention, but such devices 30 fortemperature regulation are well Iknown to those skilled in the art andare of many kinds, therefore such device is here indicated merely.diagrammatically by a box 25 to contain the.

device and electrical connections -26 and sup- 35 ply 2l. e L f A wire'28 to be enamelled passes from a supply (not shown) over a tensionpulley 29, vthence'over an idler sheave 30, down outside the appaitusand nder an idler sheave 3l immersed in a bath 40 of raw enamelcontaining a volatile coni'- bustible ingredient, such asf gasoline,alcohol, acetone, or the like, thence upward through the baking chamberI2, the wire exit passage I5 and s take-up device not shown.

As-the wire coated with raw enamel passes through the lower portion ofthe chamber I2, the volatile ingredient of the enamel -is vaporized bythe heat radiated from thewalll'll and reflected from the wall il,andthe residual enamel is baked hard by the heat of the upperportion ofthe chamber I2. The vapors evolved are The-combustion chamber Il'is-closedlat the up through the chamber I2 and the pas- 55 l Achamberi2, the wire sage I l by the inspirator action of theelements 20 and 2land forced into the combustion chamber l0 where they are burnedto'provide heat for the baking chamber I2. At the same time air is drawnin through the wire exit passages II and mixedwith the vaporslto supplyoxygen for the combustion of the vapors and of the gas from the nozzle2|, and also to cool the countermoving finished wire.

Ii' conditions require, the gas main 22 may be connected to a supply ofpressure air (not shown) as well as to a supply of pressure gas.

Instead of passing onl once through the Aay pass from second sheave Iltoa second sheave 3| on the same shaftand through the chamber I2 asecondI time to third sheave I0. By a repetition of this arrangement thewire may be given as many su ssive coats of enamel as may be desired.

baking chambers may be single chambers or comprises plurality ofchambers, each, han? dling the wires from a single supplyl spool or Itis obvious that the -vention herein illustrated and described is merelygroups of wires for the various therebypermitting differential baking ofthe various coats of enamel. u l

embodiment of the inillustrativeand may be modified in many ways withoutdeparting from the scopeand spirit of the invention, as dened in theappended claims. What is claimed is: 1. In an apparatus for treatingcores, means to deposit a composition containing a volatile combustibleingredient upon a core, a baking' chamber inQwhich the core is heated tovaporize the volatile ingredient, atcore exitpassage from the chamber.a-vapor exhaust ge from the chamber, a combustion chamber, means to drawvapors from the baking chamber, and air from the core exit passage andfor directing said vapors and airinto the combustion chamber, andmeans'in the exit passage to control the flow of air therethrough. y e i4 2. In an apparatus for treating cores, means to deposit acompositioncontaining a volatile combustible ingredient upon a .core, abaking chamber in which the core is heated to vaporize the volatileingredient, a core exit passage from the chamber, a vapor exhaustpassage fromthe chamber,- a combustion chamber, an inspirator to drawvapors from the baking chamber and air from the core exit e and fordirecting,

said vapors and air into the combustion chamaosasvo y ber, and bailiesin the e'xit pamage to .control the exit owL of air therethrough.

3. In an apparatus for treating cores, means to deposit a compositioncontaining a volatile combustible ingredient upon a' core, a bakingchamber ln which the core is heated ,to vaporize the volatileingredient, a'combustion chamber associated therewith, means to transferthe vapors from the baking chamber to the combustion chamber, andtemperature responsive means to control the enectiveness of the vaportransfer means.

4..In an apparatusfor treating cores, means to deposit a"compositioncontaining a volatile combustible ingredient upon a core. abaking chamber'in which the core is heated to vaporire the volatileingredient, a combustion chamber, a

fuel gas fed inspirator to transfer the vapor from the baking chamber tothe combustion chamber and to supply fuel thereto, and temperatureresponsive means to control the supply of gas to the inspirator.

5. In an apparatus for treating cores, means l from the bakingchamber tothe combustion 3o f chamber andto supply fuel thereto, and tem--Jperature responsive means to control the supply of gas to theinspirator positioned in the baking chamber. f

' 6. In an apparatus for treating cores, means for depositing acomposition containing a volatile combustible ingredient upon cores. aplurality of baking chambers, avcommon combustion chamber, a passageinterconnecting the baking chambers, and means in the passage fordrawing vapors from the baking chambers into the combustion chamber.

7. In an apparatus for treating cores, means to Y deposit a compositioncontaining a volatile combustible ingredient upon a core, abaking'chamber in which the core is heated to vaporize thevolatileingredient, a core exit passage from said baking chamber, acombustion chamber, and a f .fuel gas fed inspirator to transfer thevapor from the baking chamber to the combustionl chamber, to supply fuelthereto and to draw air Y through said core exit passage into saidlcombustion chamber.

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